Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Firefox Labs not showing in Settings page

  • 2 replies
  • 4 have this problem
  • 190 views
  • Last reply by Kiki
  • Solved

After the 139.0 update, I noticed 'Firefox Labs' is missing on my settings page. I checked the config and saw: browser.preferences.experimental true

I have telemetry checked Send technical and interaction data to Mozilla This helps us improve Firefox features, performance, and stability. Learn more

Once in a while the 'Firefox Labs' will appear momentarily then disappear.

Any ideas son why this is happening?

After the 139.0 update, I noticed 'Firefox Labs' is missing on my settings page. I checked the config and saw: browser.preferences.experimental true I have telemetry checked Send technical and interaction data to Mozilla This helps us improve Firefox features, performance, and stability. Learn more Once in a while the 'Firefox Labs' will appear momentarily then disappear. Any ideas son why this is happening?

Chosen solution

Alright, I figured it out.

I had to also enable 'Install and run studies'. As soon as I did that the Firefox Labs appeared.

Read this answer in context 👍 1

All Replies (2)

Chosen Solution

Alright, I figured it out.

I had to also enable 'Install and run studies'. As soon as I did that the Firefox Labs appeared.

Thanks for getting back here with the resolution. I Just marked your answer as the solution.